<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <title>流光按钮</title>
    <link rel="icon" href="sky.jpg">
    <!--按例-->
    <link rel="stylesheet" href="button_demo.css">
</head>

<body>
    <div>
        <a href="#" class="stream-light-btn">
            Button
        </a>
        <!--一个div足以-->
</body>

</html>